This is just to let the administrators and moderators of this forum know (incase they are unaware) that google is caching this forum. Therefore, if you want, you can see any past deleted posts. If the unwanted posts are not deleted immediately, they will indeed get copied into google cache and permanantly ? recorded.
For example, here is a link to see google cache of posts deleted a while ago. To search google cache, in case you are not aware, you search like this:
site:ismaili.net keyword
which will create this URL based on the search strings sent by http's "GET" request as opposed to "POST".
Since the moderator leaves the deleted post, with time it can overwrite the original cache as google updates it. But there is a period in between the deletion and update when they are intact in the cache and can be retreived.